Ontario Geological Survey
Permanent Link to this Record:
MDI31D16NW00077
| Record Name(s) | Hwy 503 Roadcut - 1986, Gibson Road (Western) Occurrence - 1986, Bear Lake Occurrence - 1986 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Discretionary Occurrence |
| Date Created | 1991-Mar-23 |
| Date Last Modified | 2022-Apr-26 |
| Created By | |
| Revised By |
Primary Commodities: Apatite (Gemstones)
Township or Area: Monmouth
Latitude: 44° 55' 24.15" Longitude: -78° 20' 4.17"
UTM Zone: 17 Easting: 710363 Northing: 4977895 UTM Datum: NAD83
Resident Geologist District: Southern Ontario
NTS Grid: 31D16NW
Point Location Description: General
Location Method: Data Compilation
Access Description: On Hwy 503, 4.3 km northeast of Gooderham.
Province: Grenville
Subprovince: Central Metasedimentary Belt
Terrane: Elzevir
Geological Age: Mesoproterozoic
| Rock Type | Rank | Composition | Texture | Relationship | Vein | 1 | Calcite | Host |
|---|---|---|---|---|
| Gneiss-Unsubdivided | 2 | Syenite | Contains |
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Amphibole | Economic | Ore | ||||
| 2 | Calcite | Economic | Ore | ||||
| 3 | Biotite | Economic | Ore | ||||
| 4 | Titanite | Economic | Ore |
Jan 27, 2017 (A Wilson) - This locality is known for its large crystals. Black amphibole occurs as large crystals and crystal groups in buff to pink coarsely crystalline calcite. Large crystals of biotite about 30 cm in diameter, and light green apatite crystals measuring up to 30 cm long occur with the amphibole. Titanite crystals measuring up to 20 cm long occur in calcite and in the granitic rocks. The calcite fluoresces bright pink in "short" ultraviolet light. The occurrence is exposed by several shallow pits along the western end of the Gibson Road. It is also known as the Bear Lake occurrence.
Publication - Rocks and minerals for the collector: Bancroft - Parry Sound area and southern Ontario; Geological Survey of Canada, Miscellaneous Report 39
Publication Number: Misc Rep 39 Page: 90 Date: 1986
Author: Sabina, A.P.
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/121046
Map - Monmouth Township, Haliburton County
Publication Number: M2174 Scale: 1:31,680 Date: 1970
Author: Armstrong H.S., Gittins J.
Publisher Name: Ontario Dept. of Mines
Location:
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